Kim Kardashiankicked off the festivities early by attending a Midori costume bash on Saturday, Oct. 27 dressed as the blonde mermaid from the 1984 film Splash, starring Daryl Hannah. "Me and my captain," Kardashian, 32, tweeted with a photo of herself and boyfriend Kanye West, 35, who wore a nautical-themed costume.

Jessica Simpson, 31, shared a photo of her family's coordinating Halloween costumes on her website Wednesday, Oct. 31. The Weight Watchers spokesperson flaunted her slim waist in a sexy milkmaid costume, while fiance Eric Johnson styled a Scottish Braveheart getup. Their adorable daughter, Maxwell Drew, 6 months, was dressed up as a chicken.

Katy Perry dressed up as Jane from MTV's cartoon Daria at the Hollywood Forever Cemetery Halloween party Oct. 31. Ex-Teen Wolf star Colton Haynes was also feeling animated that night, as he donned a costume from Disney/Pixar's Finding Nemo. That same evening, ChrisBrown, 23, wore full Taliban attire at Greystone Manor in West Hollywood. "Ain't nobody f**king wit my clique," the controversial singer wrote in a Twitter caption.